Vent The Water Heater - Rinnai SENSEI RU199i Manual De Instalación Y Operación

3.5 Vent the Water Heater

Guidelines
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Internal water heaters can be installed as direct vent or non-direct vent applications.
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When installed as Direct Vent, refer to the "Direct Vent Approved Vent Manufacturers and Products" section
(within the "1. Direct Vent" section) for a complete list of approved vent manufacturers and products.
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When installed as Non-Direct Vent (Room Air), the vent must be Category IV and of a type listed by a national
recognized testing agency.
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Exhaust must be directly vented to the outside. Combustion air can be provided from outside (Direct Vent) or
from room air (Non-Direct Vent).
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If using room air (non-direct vent) for combustion, ensure the required volume of indoor air is available
according to the National Fuel Gas Code, ANSI Z223.1/NFPA 54.
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Avoid dips or sags in horizontal vent runs by installing supports per the vent manufacturer's instructions.
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Support horizontal vent runs every 4 ft (1.2 m) and all vertical vent runs every 6 ft (1.83 m) or as per vent
manufacturer's instructions or local code requirements.
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Venting should be as direct as possible with a minimum number of pipe fittings.
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For manufactured vent systems, vent connections must be firmly pressed together so that the connections form
an air tight seal. Follow the venting manufacturer's instructions.
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Refer to the PVC/CPVC manufacturer for appropriate fittings, solvents or joining methods.
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The vent piece connected to the water heater must be secured with 1 self-tapping screw.
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Refer to the instructions of the vent system manufacturer for component assembly instructions.
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If the vent system is to be enclosed, it is suggested that the design of the enclosure shall permit inspection of the
vent system. The design of such enclosure shall be deemed acceptable by the installer or the local inspector.
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Any issues resulting from improper vent installation will not be covered by warranty.
WARNING
DO NOT use cellular core PVC/CPVC.
DO NOT use Radel, ABS, or galvanized material to vent this appliance.
DO NOT cover non-metallic vent pipe and fittings with thermal insulation.
DO NOT combine vent components from different manufacturers.
DO NOT reduce the vent diameter. Vent diameter cannot be less than 2 in. (51 mm).
DO NOT connect the venting system with an existing vent or chimney.
DO NOT common vent with the vent pipe of any other manufacturer's water heater or appliance.
Rinnai water heaters can only be common vented with Schedule 40 PVC/CPVC or with a Rinnai certified
common vent system.
Rinnai Tankless Water Heater Installation and Operation Manual 17